Estimated Fair Values of Assets Acquired and Liabilities Assumed for Danfotech Acquisition (Details) (Danfotech, USD $) In Thousands, unless otherwise specified	Dec. 31, 2011	Jul. 05, 2011
Business Acquisition [Line Items]
Cash		$ 165
Deferred tax asset		235
Current assets		703
Property, plant and equipment		47
Goodwill		5,678
Other intangibles		1,086
Other assets		4
Current liabilities		(1,116)
Long-term deferred tax liability		(137)
Other non-current liabilities		(750)
Consideration paid at closing		5,915
Additional assets acquired post closing	700	730
Contingent consideration		1,500
Net assets acquired and liabilities assumed		8,145
as initially reported
Business Acquisition [Line Items]
Cash		165
Deferred tax asset		0
Current assets		1,073
Property, plant and equipment		102
Goodwill		3,423
Other intangibles		1,864
Other assets		4
Current liabilities		(309)
Long-term deferred tax liability		(46)
Other non-current liabilities		0
Consideration paid at closing		6,276
Additional assets acquired post closing		0
Contingent consideration		1,500
Net assets acquired and liabilities assumed		7,776
Measurement Period Adjustments
Business Acquisition [Line Items]
Cash		0
Deferred tax asset		235
Current assets		(370)
Property, plant and equipment		(55)
Goodwill		2,255
Other intangibles		(778)
Other assets		0
Current liabilities		(807)
Long-term deferred tax liability		(91)
Other non-current liabilities		(750)
Consideration paid at closing		(361)
Additional assets acquired post closing		730
Contingent consideration		0
Net assets acquired and liabilities assumed		$ 369